73 results about "Mass transfer coefficient" patented technology

A carbonate rock rough slit acid liquid mass transfer coefficient calculation method comprises the following steps: 1) setting conditions based on carbonate rock rough morphology, and constructing a diffusion boundary layer thickness equation under the rough morphology conditions; and 2) solving to obtain the thickness of the diffusion boundary layer, and calculating the mass transfer coefficient according to the relational expression between the thickness of the diffusion boundary layer and the mass transfer coefficient. The carbonate rock rough slit acid liquid mass transfer coefficient calculation method is provided by considering rough morphology influence, no slippage of the acid liquid and filtration loss, and compared with a plane assumption condition in the prior art, the method is more consistent with a real condition, and the coincidence degree with an experimental test result is higher.

The invention belongs to the field of soil environment pollution simulation and prediction, and provides a prediction method based on a two-point chemical unbalanced model, which is used for quantitatively evaluating the effect of regulating and controlling the migration behavior of p-nitrophenol in acid red soil by straw stalk biochar. According to the method, a biochar-red soil composite medium system is constructed, a soil column leaching experiment is carried out to obtain penetration curve data, a two-point chemical unbalance model in CXTFIT software is utilized to carry out parameter inversion, and key parameters such as a retardation factor, a two-region distribution coefficient, a mass transfer coefficient and a liquid phase degradation coefficient are accurately identified. Model verification shows that the goodness of fit is high, and a parameter change rule reveals the inherent mechanism of enhancing the pollutant retention capacity, changing the proportion of fast and slow adsorption sites and influencing mass transfer kinetics by the biochar. Based on the verified model, the long-term migration behavior and pollution risk of p-nitrophenol under different environmental conditions can be simulated, and a scientific basis is provided for groundwater pollution control and remediation strategy optimization.

The application discloses a novel advanced oxidation device which comprises an outer shell, a gas-liquid mixing chamber, an ultrasonic atomization disc, an air inlet hole, a water inlet hole, an ozone generator, a UV reaction disc tube and the like. Through ultrasonic catalysis and ultraviolet light catalysis, O3 is excited to generate a large amount of higher oxidizing ·OH, the mixing degree and turbulence intensity of ozone and sewage are improved, the mass transfer coefficient is increased, the mass transfer rate of ozone is improved, four-stage oxidation reactions are carried out in one reactor, and thus the ozone oxidation efficiency and effect are greatly improved, the pollutants in the wastewater are subjected to intensified oxidation, and thus the pollutants in the wastewater are degraded and removed.

The invention provides a rapid salinity and moisture determination method based on ultrasonic synergistic tumbling and pickling beef, which comprises the following steps: determining the salinity and moisture content in the ultrasonic synergistic tumbling and pickling beef by using a traditional physical and chemical analysis method, and obtaining corresponding predicted values by depending on a Fick second law diffusion model; correlation analysis is carried out on the measured value and the predicted value, and a diffusion model with good fitting is established; establishing a mathematical model between different ultrasonic powers of the ultrasonic synergistic tumbling equipment and mass transfer coefficients of salt and water, and enabling the ultrasonic powers to be in one-to-one correspondence with the mass transfer coefficients of salt and water; and combining the mathematical model with the diffusion model to quickly predict the content of salt and moisture in the beef pickled for the specified time under the specified ultrasonic power. The method disclosed by the invention is convenient and efficient, can provide support for rapid salt and moisture determination and process optimization for enterprises, is beneficial to popularization of an ultrasonic synergistic tumbling pickling technology in meat pickling, and meets the standardized production requirements of meat enterprises.

The application discloses a method for determining and distinguishing methane bubble flux and diffusion flux released by water bodies, and belongs to the field of methane flux determination in environmental water bodies, and comprises the following steps: determining the gas content of CH4 and N2O in the gas after the water body at a sampling point and surrounding atmosphere are shaken together and in the surrounding atmosphere of the water body at the sampling point, calculating the gas concentration of CH4 and N2O in the water body when the water body and the surrounding atmosphere are balanced and in the water body at the actual sampling point; determining the release flux of N2O and the total release flux of CH4 in the water body; calculating and comparing the gas mass transfer coefficients of diffusion type CH4 and total CH4; and calculating the CH4 diffusion and bubble flux. The application utilizes N2O to calculate the CH4 diffusion flux, realizes the rapid distinction of bubble type and diffusion type CH4 of water bodies, can collect and determine CH4 gas on a large scale in multiple environments, and solves the problems that CH4 determination is easily affected by the environment, time-consuming is relatively long, and it is difficult to capture occasional bubble events.

The application discloses a KR molten iron pretreatment endpoint sulfur content prediction method and system, comprising the following steps: obtaining the current KR molten iron pretreatment process molten iron ladle and stirring paddle structure parameters, molten iron weight and temperature parameters, and stirring paddle rotating speed and immersion depth parameters; obtaining the molten iron flow field change relationship formula according to the above obtained parameters; obtaining the current KR molten iron pretreatment process desulfurizer addition amount and desulfurizer diameter parameters; obtaining the desulfurization rate constant and mass transfer coefficient change relationship formula according to the above parameters and the molten iron flow field distribution data; determining the molten iron sulfur content change relationship formula with the KR molten iron pretreatment process parameters according to the desulfurization mass transfer coefficient, and determining the target time molten iron sulfur content. The technical scheme of the application can quantitatively predict the molten iron sulfur content change and the target time sulfur content size under different KR molten iron pretreatment process parameters.

The invention relates to the technical field of water treatment equipment multi-dimensional management, and discloses a water treatment equipment multi-dimensional management system based on an intelligent water affair cloud platform, and the system comprises the steps: calculating a dynamic alpha factor in real time through on-site off-gas detection data and a clear water reference mass transfer coefficient, and carrying out the real-time calculation of a dynamic alpha factor based on the monotonous relation between a bubble stagnation cap and mass transfer resistance; and performing inversion to obtain continuous parameters for quantifying the gas-liquid interface state. And further calculating the real-time sensitivity of the parameter to the air volume of the air blower, constructing an air volume and mass transfer nonlinear model, and solving the target air volume with the minimum energy consumption under the condition of meeting the technological oxygen demand constraint condition. And finally, the target air volume serves as a control instruction to be issued, meanwhile, interface recovery time is output according to the time change rate of the gas-liquid interface parameters, and dynamic energy saving and interface state collaborative management of the water treatment aeration system is achieved.

This utility model discloses a mixing agitator for a hydrogenation reactor, comprising a reactor body, multiple legs fixedly connected to the outer wall of the bottom of the reactor body, a top cover rotatably connected to the top of the reactor body, a feed pipe fixedly connected to the top of the top cover, a feed cover plate rotatably connected to the top of the feed pipe, a discharge pipe fixedly connected to the bottom of the reactor body, a discharge valve fixedly connected to the outer wall of the discharge pipe, a stirring mechanism installed on the inner wall of the reactor body, an aeration treatment mechanism installed on the top of the reactor body, and a foam elimination mechanism installed inside the reactor body. The air pump of this utility model's aeration treatment mechanism introduces hydrogen gas into the rotating shaft through the air inlet pipe, and sprays it out from the aeration pipe through the air guide hose. This, combined with the motor driving the rotating shaft and stirring rod of the stirring mechanism, causes the hydrogen gas to disperse into tiny bubbles. Simultaneously, a scraper removes material from the reactor wall, avoiding dead zones and improving the uniformity of the gas-liquid-solid three-phase mixing. The mass transfer coefficient is improved compared to traditional agitators.

The application discloses a kind of prediction method and system of cut tobacco outlet moisture, belong to cut tobacco outlet moisture prediction technical field.Its method includes: obtaining the outside boundary condition of cylinder of cut tobacco machine;The outside boundary condition of cylinder includes historical outside boundary condition and current outside boundary condition;The historical outside boundary condition is input into the fuzzy rule classification model constructed in advance, and current working condition stage is output;The current outside boundary condition and the inside boundary condition of cylinder mechanism model feedback are input into the heat and mass transfer regression algorithm model constructed in advance, and inside heat and mass transfer coefficient of cylinder is output;The current outside boundary condition, current working condition and inside heat and mass transfer coefficient of cylinder are input into the cylinder mechanism model constructed in advance, and the predicted value of cut tobacco machine outlet moisture is output.The application can consider the multiple limiting conditions existing in actual production, and organically combine cut tobacco machine mechanism model and data model, can predict cut tobacco machine outlet moisture under given condition.

The present application provides a kind of wastewater treatment aeration control system and method based on multi-parameter collaborative optimization, the present application utilizes multi-parameter sensor module to collect the multi-sensor data of COD, BOD5, DO, ammonia nitrogen, ORP, pH, influent flow, sludge concentration of wastewater in aeration tank;And according to the relationship between dynamic correction oxygen mass transfer coefficient and feedforward parameter, establish influent load and aeration;Through PID control algorithm and feedback parameter, the fine tuning value of blower air volume and butterfly valve opening is calculated, and the total air volume target value is obtained by correcting the aeration amount;Using adaptive PID controller, according to the adaptive PID control parameter and the total air volume target value corrected, the guide vane opening and speed of blower are adjusted, and according to the gradient butterfly valve adjustment strategy, the butterfly valve opening is adjusted.The present application uses adaptive PID to optimize blower output, and dynamically adjusts the butterfly valve opening of each biological tank through gradient valve adjustment strategy, realizes precise control of aeration amount;Ensure the effect of wastewater treatment.

The invention relates to the technical field of sewage treatment equipment, in particular to a three-phase flow short-range anaerobic ammonium oxidation and anaerobic ammonium oxidation flora construction system construction filler and a structure thereof.The three-phase flow short-range anaerobic ammonium oxidation and anaerobic ammonium oxidation flora construction system construction filler comprises a filler body, the filler body is made of a porous ceramsite material, a columnar cavity is formed in the center of the filler body, and through type communicating pores are evenly distributed in the side wall of the filler body; the filler realizes comprehensive improvement of mass transfer efficiency, biological activity and engineering applicability through collaborative design of a structure and a material: a three-dimensional flow field remarkably improves the mass transfer coefficient, the ammonia nitrogen removal rate is greatly improved, and the nitrite accumulation rate is kept at a relatively high level; and the nano coating enhances the nitrosobacteria adhesion ability, and effectively prolongs the blocking period in cooperation with rib wire microbubble scouring.

The invention relates to the technical field of adsorption detection, and discloses an imidazolium resin adsorption kinetic parameter online identification method and system.The method comprises the steps that 1, flow, inlet and outlet water concentration, conductivity, temperature and pH value are synchronously collected, and apparent ion strength is obtained through the conductivity; step 2, performing mass balance based on the flow, the inlet and outlet water concentration and the resin dry basis mass to obtain a real-time track of the average adsorption capacity of the resin; step 3, constructing counter-ion coupling isothermal driving force and screening a quasi-balance section; 4, solving isothermal coupling parameters by combining a quasi-balance relational expression; 5, calculating an overall mass transfer coefficient point by point; step 6, simultaneously solving an outer membrane mass transfer proportionality coefficient and an in-hole mass transfer coefficient under two levels of flow; and step 7, constructing a core parameter group and outputting a consistency judgment result identifier. According to the method, online identification and consistency judgment of the adsorption thermodynamic parameters and the mass transfer kinetic parameters of the imidazolium resin are realized.

The invention discloses a method for measuring and distinguishing bubbling flux and diffusion flux of methane released by a water body, which belongs to the field of methane flux measurement in environmental water bodies and comprises the following steps: measuring the gas content of CH4 and N2O in gas generated after the water body at a sampling point and the surrounding atmosphere are oscillated together and in the surrounding atmosphere of the water body at the sampling point; calculating the gas concentrations of CH4 and N2O in the water body when the water body at the sampling point and the surrounding atmosphere are balanced and in the water body at the actual sampling point; measuring the release flux of N2O and the total release flux of CH4 in the water body; calculating and comparing the gas mass transfer coefficients of the diffusion type CH4 and the total CH4; and calculating the CH4 diffusion and bubbling flux. According to the method, N2O is used for calculating the diffusion flux of CH4, rapid distinguishing of bubbling type CH4 and diffusion type CH4 in a water body is achieved, CH4 gas can be collected and measured in a large scale in multiple environments, and the problems that CH4 measurement is prone to being affected by the environment, consumed time is long, and accidental bubbling events are difficult to capture are solved.

The application discloses an inner component, a leaching tower and a removal system, a method for removing small molecular substances in polyglycolic acid, a product and application. The inner component comprises a conical part and a trumpet part; at least part of the wide opening end of the conical part is arranged in the trumpet part, and there is an annular gap between the wide opening end of the conical part and the inner surface of the trumpet part on the same plane as the wide opening end of the conical part; in the generatrix of the conical part, the line connecting the wide opening end and the narrow opening end of the conical part is an arc; in the generatrix of the trumpet part, the line connecting the wide opening end and the narrow opening end of the trumpet part is an arc. The newly developed inner component can improve the liquid-solid two-phase speed in the leaching tower, improve the mass transfer coefficient, and at the same time, the curved surface design can increase the rotating speed of the particles to improve the surface renewal effect of the particles, thereby promoting the leaching effect of the small molecular substances. The method for removing small molecular substances in polyglycolic acid can effectively reduce the small molecular content in PGA.

The invention provides an extraction separation process intelligent simulation optimization method based on digital twinning, which relates to the technical field of chemical process control, and comprises the following steps: establishing a digital twinning model and a numerical calculation model of extraction separation physical equipment, and generating a simulation reference state; acquiring real-time operation data, comparing the real-time operation data with a simulation reference state, identifying a deviation region, adjusting a local mass transfer coefficient, and solving to obtain a correction state field; constructing a coupling matrix of concentration gradient and velocity distribution based on the correction state field, and calibrating a mass transfer dominant flow area through characteristic decomposition; setting a virtual disturbance source in the region to perform multi-working-condition simulation, and screening an optimal disturbance frequency; extracting the distribution variance of the retention time of the tower section, calibrating a flow offset tower section, and calculating the space overlapping degree of the flow offset tower section and the mass transfer dominant flow area; and the aperture ratio of the distributor or the feeding pulsation frequency is selectively adjusted according to the overlapping degree. Accurate simulation and dynamic optimization of the extraction separation process are realized, and the mass transfer efficiency and the separation performance are improved.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a preparation method and system of lithium sulfide, and the method comprises the following steps: raw material pretreatment: mixing lithium hydroxide powder with an organic solvent according to a certain mass ratio, and stirring in a dissolving kettle to form a suspension; supergravity reaction: feeding the suspension liquid into a rotating filler layer of a supergravity reactor in an axial liquid inlet manner, and introducing preheated hydrogen sulfide gas into the rotating filler layer in a tangential gas inlet manner at the same time for reaction; and product separation: carrying out filter pressing separation on the reaction liquid of the supergravity reactor to obtain a lithium sulfide wet material, washing the lithium sulfide wet material for a plurality of times, and drying the lithium sulfide wet material to obtain lithium sulfide powder. According to the method disclosed by the invention, the mass transfer resistance limitation in the gas-liquid-solid three-phase reaction can be broken through in the lithium sulfide preparation process, the volume mass transfer coefficient of H2S in the liquid phase is remarkably improved, and the purposes of increasing the gas-liquid contact area and shortening the reaction time are achieved.

The invention discloses a woven membrane with an inclination angle, a double-layer woven degassing membrane prepared from the woven membrane and application of the double-layer woven degassing membrane. The woven membrane is formed by weaving a plurality of membrane filaments and weaving yarns, and the weaving direction of the membrane filaments and the weaving direction of the weaving yarns form a non-vertical included angle; the double-layer woven membrane comprises two woven membrane pieces, one woven membrane piece is rotated by 180 degrees in the warp direction and then attached to the other woven membrane piece, and a liquid flow channel with non-parallel wall faces is formed between the two woven membrane pieces. The prepared double-layer woven degassing film can actively enhance fluid disturbance and improve the mass transfer coefficient; according to the membrane type oxygenator prepared by using the degassing membrane, the pre-filling amount can be reduced to an acceptable range of small animals.

The application discloses a gas treatment reactor with a back-mixing inner part and belongs to the technical field of gas treatment equipment. The gas treatment reactor comprises a cylinder, an upper head connected to the upper end of the cylinder and a lower head connected to the lower end of the cylinder, an exhaust pipe is connected to the upper part of the upper head, a liquid discharge pipe is connected to the lower part of the lower head, a liquid inlet pipe is connected to the upper part of the cylinder below the upper head, a gas inlet pipe is connected to the upper part of the cylinder above the lower head, a back-mixing inner part is installed on the inner wall of the cylinder above the gas inlet pipe, and a defoaming mechanism is also installed on the inner wall of the cylinder. The gas treatment reactor provided by the application is internally provided with the back-mixing inner part, a vortex of liquid phase back-mixing is formed when gas and liquid are contacted at the lower part of the reactor, the mass transfer coefficient is increased, the residence time of the gas-liquid two-phase is increased, meanwhile, the device of the application does not need a large number of tower plates and other components, and the transformation from a gas absorption plate-type tower to a new-type reactor is realized.

The application provides a heterogeneous reservoir acid fracturing parameter design method and system, the method constructs an acidification reconstruction geometric model for a reservoir to be reconstructed, introduces required acidification section length and section thickness data to calculate acid liquid flow rates in fractures under different construction discharge capacities in combination with fracture attribute data, further considers acid etching reaction rates and mass transfer coefficients to calculate acid concentrations on inner walls of fractures reacted with a reservoir matrix, determines etching widths of natural fracture walls according to attribute parameters of the reservoir matrix, further calculates reservoir etching volumes corresponding to different construction acid amounts and acid etching fracture widths and lengths, finally decides corresponding acid etching fracture conductivity capacities according to a correction principle of an N-K model, and selects optimal acid injection parameters according to preset optimization conditions. By using the scheme, the problems of small calculation scales and complicated operations in the prior art are effectively overcome, analytical solutions are flexibly used in the calculation process, and an acid injection scheme with optimal acid etching effects and conductivity capacities is accurately and efficiently selected.

Please replace the specification with the attached substitute specification Provided is a manufacturing method for concentrating a predetermined feed solution with a concentrating apparatus and manufacturing a concentrated solution, wherein: the feed solution includes at least a solute, a first solvent and a second solvent; the concentrating apparatus has a concentrating module which concentrates the feed solution via a concentrating membrane; the manufacturing method comprises: inputting target concentrated solution information including a target composition of the concentrated solution; acquiring current concentrated solution information including a current composition of the concentrated solution; acquiring previous concentrated solution information including a previous composition of the concentrated solution; calculating, mass transfer coefficient of the concentrating membrane; calculating, a driving force for the concentrated solution to pass through the concentrating membrane; and calculating, predicted concentrated solution information including composition of the concentrated solution after elapse of a certain period of time.

The invention mainly relates to the technical field of hydrogen energy application, in particular to a simulation calculation method and device for an oxygen mass transfer coefficient in a fuel cell catalyst layer. The invention provides a simulation calculation method for an oxygen mass transfer coefficient in a fuel cell catalytic layer. The simulation calculation method comprises the following steps: establishing a fuel cell numerical model based on an aggregate sub-model; based on the numerical model, constructing an iterative algorithm based on a fuel cell polarization curve; setting an oxygen mass transfer coefficient in the catalyst layer as an initial value within a preset value range, calculating based on an iterative algorithm to obtain a corresponding simulated polarization curve, and comparing the simulated polarization curve with a pre-obtained experimental polarization curve to obtain an error value; and based on the obtained error value as a convergence criterion, updating the value of the oxygen mass transfer coefficient through the iterative algorithm until the error value meets a preset threshold value, and outputting the corresponding oxygen mass transfer coefficient. And efficient and accurate calculation of the mass transfer coefficient of oxygen in the ionomer is realized.

The invention discloses a carbonate rock rough slit H + mass transfer coefficient calculation method based on a power law acid solution. The method comprises the following steps: 1) deriving a mass transfer coefficient calculation method based on a boundary layer theory and a two-dimensional convective diffusion differential equation; and 2) considering and correcting the power law characteristics of the acid liquor, and constructing the H + mass transfer coefficient calculation method.Compared with the prior art, the H + mass transfer coefficient calculation method provided by the invention considers the power law characteristics of the acid liquor, and is more suitable for the actual situation of a field non-Newtonian acid liquor system.

The invention discloses 2-hydroxyacetophenone as well as a preparation method and application thereof. Comprising the following steps: S1, adding deionized water, sodium formate, ammonium chloride and a catalyst into a reaction container, starting mechanical stirring, raising the temperature to 80 DEG C, maintaining the temperature for 15-30 minutes, and closing a heating device; s2, alpha-bromoacetophenone is added in batches, the alpha-bromoacetophenone is added once every 15 minutes, stirring is kept during feeding, stirring is continued for 10-15 minutes after feeding is finished, and after uniform mixing, a heating device is turned on to start heating. The alpha-bromoacetophenone is added in batches, high-rotating-speed stirring is combined, oil-water layering is avoided, brominated substances are hydrophobic organic substances, and phase separation caused by too high local concentration can be prevented through rapid dispersion; the micro-turbulence formed by stirring enables reactants to be in full contact with the catalyst, and the mass transfer coefficient is increased by 2.5 times.

The application provides a high-rise building gap structure ozone permeation flux prediction method, device, equipment and storage medium, relating to the environmental pollution control technical field.The method comprises the following steps: obtaining multi-source parameters from BIM, material library and meteorological data; using CFD simulation to obtain the dynamic wind pressure field of the building surface, and extracting the wind pressure difference, wind speed, temperature and concentration data and other key driving data at the permeation node; deploying a lightweight PINN proxy model at the permeation node, receiving the driving data and gap geometric parameters, training through embedding the Darcy law physical constraint, and directly predicting the microscale ozone permeation flux; through online dynamic correction of the mass transfer coefficient and comprehensive equivalent pressure difference, coupling the wind pressure enhancement effect, material aging mechanism and thermal pressure effect, realizing real-time coupling simulation of wind, heat and material multi-physical fields. The application realizes high-precision and high-efficiency ozone permeation dynamic prediction.

The invention discloses an intelligent control method and system for wet desulphurization of a thermal power plant, relates to the technical field of wet desulphurization of thermal power plants, and aims to improve the accuracy of limestone slurry supply. The method comprises the following steps: intercepting historical data from a real-time operation data sequence of the desulfurization system to construct a rolling estimation window; establishing a double-process decoupling mechanism model comprising a gas-liquid mass transfer fast dynamic sub-process and a limestone dissolution slow dynamic sub-process; calculating a slurry chemical buffer index in the rolling estimation window; assigning the dynamic lag time in the limestone dissolution slow dynamic sub-process based on a preset nonlinear mapping relation and the slurry chemical buffer index to obtain corrected lag time; in the rolling estimation window, the corrected lag time is used as a known parameter to be substituted into the double-process decoupling mechanism model, and an optimized gas-liquid mass transfer coefficient and an optimized limestone activity coefficient are solved; updating the dual-process decoupling mechanism model according to the optimization coefficient and the correction delay time; a future limestone slurry supply flow command is calculated based on the model.

The invention relates to the technical field of aeration control of sewage treatment plants, and discloses an aeration control method and device based on a CFD-PBM coupling model, and the method comprises the steps: constructing a CFD-PBM coupling model of an aeration tank of a sewage treatment plant; solving the CFD-PBM coupling model of the aeration tank of the sewage treatment plant based on the operation parameters of the aeration tank of the target sewage treatment plant to obtain a comprehensive oxygen mass transfer coefficient; predicting the dissolved oxygen concentration based on the inflow water quality parameter of the target sewage treatment plant, the water temperature of the aeration tank and the comprehensive oxygen mass transfer coefficient to obtain dissolved oxygen concentration distribution prediction data; establishing an optimal aeration control strategy based on the dissolved oxygen concentration distribution prediction data and the operation parameters of the aeration tank of the target sewage treatment plant; and performing aeration control on the aeration equipment by using the optimal aeration control strategy. According to the invention, the oxygen mass transfer efficiency in the aeration control process is improved, the aeration energy consumption is reduced, and the sewage treatment effect is improved.

The invention discloses a method for measuring a gas-liquid mass transfer coefficient of an oxygen-water system in a tubular reactor and an industrial amplification method of a gas-liquid chemical reaction. The method comprises the following test steps: S1, introducing a sodium sulfite aqueous solution, pure water and gas into a tubular reactor, wherein the gas contains oxygen; and S2, adjusting the flow velocity of the sodium sulfite aqueous solution and the flow velocity of the pure water to enable the concentration of oxygen at the outlet end of the tubular reactor to be lower than 0.01 mg / L, and recording the flow velocity QNa2SO3 of the sodium sulfite aqueous solution, the flow velocity QH2O of the pure water and the outlet concentration CNa2SO3out of the sodium sulfite aqueous solution at the moment. The method provided by the invention can be used for guiding the industrial amplification process of the gas-liquid reaction, and the condition parameters in the system are adjusted to meet the requirement of higher gas-liquid mass transfer coefficient during industrial amplification, so that the reaction efficiency of the industrial amplification is improved.

This invention provides an enhanced heat and mass transfer tube insert and a heat and mass transfer conduit. The insert is a tubular body, the wall of which is composed of multiple alternating near-wall guide sections and central guide sections. The near-wall guide sections are outwardly convex structures arranged along the axial direction of the tubular body, and the central guide sections are inwardly concave structures arranged along the axial direction of the tubular body. Turbulence holes are uniformly arranged on both the near-wall and central guide sections, and each turbulence hole is equipped with a turbulence plate extending into or out of the tubular body wall. By providing turbulence holes and turbulence plates on both the near-wall and central guide sections, this invention allows the near-wall guide sections to direct fluid near the wall of the heat and mass transfer tube to the center, and the central guide sections to direct fluid from the center of the heat and mass transfer tube to the near-wall, generating radial turbulence, breaking the laminar flow state within the heat and mass transfer tube, and improving the heat and mass transfer coefficient.

The present application relates to a method for establishing a prediction model of CO2 mass transfer performance of an organic amine solution and a prediction method, water and an organic amine solution are used as absorbents, CO2 absorption experiments of mixed gas are carried out in a packed tower, and experimental data under N groups of different conditions are obtained; an equation group is established through the experimental data under N groups of different conditions and the values of the corresponding conditions, the equation group is solved, and the specific values of m'1-m'7 are obtained; and the total mass transfer coefficient K G a V of the organic amine solution under the condition is obtained. The prediction model established by the method of the present application has a very high matching degree with the target value in predicting the mass transfer performance, and compared with experience and semi-empirical formula, the prediction model exhibits very excellent prediction performance.

The application belongs to the field of liquid flow battery, and particularly relates to a concentration polarization measurement method suitable for carbon felt / bipolar plate structure of a liquid flow battery. First, the limiting current density under different electrolyte flow rates is measured by using a symmetrical battery structure, the local mass transfer coefficient under the corresponding flow rate is obtained from the relationship between the limiting current density and the local mass transfer coefficient, then the relationship between the local mass transfer coefficient and the flow rate is fitted, and finally the relationship is substituted into the concentration polarization formula, and the concentration polarization size and spatial distribution of the battery under specific conditions are calculated by using a finite element method. The application has the advantages of simple method, low cost, easy implementation, and the like, can be widely applied to various forms of electrode / bipolar electrode structures, various types of redox flow batteries, and has strong practicability.